sf.net.experimaestro.utils.gson.JsonAdapter.java Source code

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Here is the source code for sf.net.experimaestro.utils.gson.JsonAdapter.java

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package sf.net.experimaestro.utils.gson;

/*
 * This file is part of experimaestro.
 * Copyright (c) 2014 B. Piwowarski <benjamin@bpiwowar.net>
 *
 * experimaestro is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * experimaestro is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with experimaestro.  If not, see <http://www.gnu.org/licenses/>.
 */

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import sf.net.experimaestro.manager.json.*;

import java.io.IOException;

/**
 * Json adapter
 */
public class JsonAdapter extends TypeAdapter<Json> {
    @Override
    public void write(JsonWriter out, Json value) throws IOException {
        value.write(out);
    }

    @Override
    public Json read(JsonReader in) throws IOException {
        return readValue(in);
    }

    private Json readValue(JsonReader in) throws IOException {
        final JsonToken peek = in.peek();
        switch (peek) {
        case BEGIN_ARRAY:
            in.beginArray();
            JsonArray array = new JsonArray();
            while (in.peek() != JsonToken.END_ARRAY) {
                array.add(readValue(in));
            }
            in.endArray();
            return array;

        case BEGIN_OBJECT:
            in.beginObject();
            JsonObject object = new JsonObject();
            while (in.peek() != JsonToken.END_OBJECT) {
                final String name = in.nextName();
                final Json value = readValue(in);
                object.put(name, value);
            }
            in.endObject();
            return object;

        case BOOLEAN:
            return new JsonBoolean(in.nextBoolean());

        case NUMBER:
            final double value = in.nextDouble();
            if (value == Math.round(value))
                return new JsonInteger((long) value);
            return new JsonReal(value);

        case STRING:
            return new JsonString(in.nextString());

        case NULL:
            return JsonNull.getSingleton();

        case NAME:
        case END_OBJECT:
        case END_ARRAY:
        case END_DOCUMENT:
            throw new AssertionError("Not expecting " + peek);
        }
        return null;
    }
}